US2446929A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for electrically heating material
Assignee: MW Kellogg Co
•
Filing: 1945-12-22
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Granted: 1948-08-10
•
Expires: 1965-12-22
Abstract
No abstract record available.
Inventors
- 👤 Robert K Hopkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:19
CPC Classifications
F; F27; F27D; F27D11/00; F27D11/08; H; H05; H05B; H05B7/00; H05B7/18; H05B7/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2278569A
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US2370467A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-08-10 | 1952-02-09 | 1952-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-08-10 | 1956-02-09 | 1956-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-08-10 | 1960-02-09 | 1960-08-10 | $7700.00 | Window Closed / Lapsed |